Linux “inet_pton”：未找到标识符

'inet_pton': identifier not found

提问by abdo.eng 2006210

I'm trying to include the following code in my program but the error ('inet_pton': identifier not found) will appeared.

我试图在我的程序中包含以下代码，但会出现错误 ('inet_pton': identifier not found)。

// IPv4:

struct sockaddr_in ip4addr;
int s;

ip4addr.sin_family = AF_INET;
ip4addr.sin_port = htons(3490);
inet_pton(AF_INET, "10.0.0.1", &ip4addr.sin_addr);

s = socket(PF_INET, SOCK_STREAM, 0);
bind(s, (struct sockaddr*)&ip4addr, sizeof ip4addr);

Output

输出

 error C3861: 'inet_pton': identifier not found

the including header

包含标题

 #include <stdio.h>
 #include <stdlib.h>
 #include "udpDefine.h"
 #include <windows.h>

any helping may be missed some headers or lib.

任何帮助都可能会错过一些标题或库。

采纳答案by 4pie0

the function

功能

int inet_pton(int af, const char *src, void *dst);

is declared in header file:

在头文件中声明：

#include <arpa/inet.h>

if this is Windows (Vista or later) there is Winsock analog to this ANSI version:

如果这是 Windows（Vista 或更高版本），则有与此 ANSI 版本类似的 Winsock：

INT WSAAPI InetPton(
  _In_   INT  Family,
  _In_   PCTSTR pszAddrString,
  _Out_  PVOID pAddrBuf
);

try #include <Ws2tcpip.h>add Ws2_32.lib

尝试#include <Ws2tcpip.h>添加 Ws2_32.lib

回答by Petar Korponai?

In windows XP (and later) you can use these functions:

在 Windows XP（及更高版本）中，您可以使用以下功能：

#include <stdlib.h>
#include <string.h>
#include <stdio.h>    

#include <winsock2.h>
#include <ws2tcpip.h>


int inet_pton(int af, const char *src, void *dst)
{
  struct sockaddr_storage ss;
  int size = sizeof(ss);
  char src_copy[INET6_ADDRSTRLEN+1];

  ZeroMemory(&ss, sizeof(ss));
  /* stupid non-const API */
  strncpy (src_copy, src, INET6_ADDRSTRLEN+1);
  src_copy[INET6_ADDRSTRLEN] = 0;

  if (WSAStringToAddress(src_copy, af, NULL, (struct sockaddr *)&ss, &size) == 0) {
    switch(af) {
      case AF_INET:
    *(struct in_addr *)dst = ((struct sockaddr_in *)&ss)->sin_addr;
    return 1;
      case AF_INET6:
    *(struct in6_addr *)dst = ((struct sockaddr_in6 *)&ss)->sin6_addr;
    return 1;
    }
  }
  return 0;
}

const char *inet_ntop(int af, const void *src, char *dst, socklen_t size)
{
  struct sockaddr_storage ss;
  unsigned long s = size;

  ZeroMemory(&ss, sizeof(ss));
  ss.ss_family = af;

  switch(af) {
    case AF_INET:
      ((struct sockaddr_in *)&ss)->sin_addr = *(struct in_addr *)src;
      break;
    case AF_INET6:
      ((struct sockaddr_in6 *)&ss)->sin6_addr = *(struct in6_addr *)src;
      break;
    default:
      return NULL;
  }
  /* cannot direclty use &size because of strict aliasing rules */
  return (WSAAddressToString((struct sockaddr *)&ss, sizeof(ss), NULL, dst, &s) == 0)?
          dst : NULL;
}

Link with ws2_32 library.

与 ws2_32 库链接。

回答by Sid

To fix this problem just add the following to your code after all #includes

要解决此问题，只需在所有 #includes 之后将以下内容添加到您的代码中

#pragma comment(lib, "ws2_32.lib")

回答by David Gausmann

In my case the function couldn't be found, because there was a "#define WINVER 0x0502" somewere in a header file.

在我的情况下，找不到该函数，因为头文件中有“#define WINVER 0x0502”。

On Windows systems the version 0x600 (= Vista) is as least required for this function.

在 Windows 系统上，此功能至少需要版本 0x600 (= Vista)。

回答by Michal M.

Windows users can also find the answer here:

Windows 用户也可以在这里找到答案：

https://docs.microsoft.com/en-us/windows/desktop/api/ws2tcpip/nf-ws2tcpip-inetptonw

https://docs.microsoft.com/en-us/windows/desktop/api/ws2tcpip/nf-ws2tcpip-inetptonw

The InetPtonfunction converts an IPv4 or IPv6 Internet network address in its standard text presentation form into its numeric binary form. The ANSI version of this function is inet_pton.

该InetPton函数将标准文本表示形式的 IPv4 或 IPv6 Internet 网络地址转换为其数字二进制形式。此函数的 ANSI 版本是inet_pton.

The InetPtonfunction is supported on Windows Vista and later.

InetPtonWindows Vista 及更高版本支持该功能。

When UNICODEor _UNICODEis not defined, InetPtonis defined to InetPtonA, the ANSI version of this function. The ANSI version of this function is always defined as inet_pton.

当UNICODE或_UNICODE未定义时，InetPton定义为InetPtonA，此函数的 ANSI 版本。此函数的 ANSI 版本始终定义为inet_pton.

Header      ws2tcpip.h
Library     Ws2_32.lib
DLL         Ws2_32.dll

Header      ws2tcpip.h
Library     Ws2_32.lib
DLL         Ws2_32.dll

You need to use the ws2tcpip.hheader and add Ws2_32.libto your linker.

您需要使用ws2tcpip.h标头并添加Ws2_32.lib到链接器中。

回答by UFO

In WS2tcpip.h, this api inet_pton is defined:

在 WS2tcpip.h 中，定义了这个 api inet_pton：

#if (NTDDI_VERSION >= NTDDI_VISTA)
WINSOCK_API_LINKAGE
INT
WSAAPI
inet_pton(
    _In_                                      INT             Family,
    _In_                                      PCSTR           pszAddrString,
    _When_(Family == AF_INET, _Out_writes_bytes_(sizeof(IN_ADDR)))
    _When_(Family == AF_INET6, _Out_writes_bytes_(sizeof(IN6_ADDR)))
                                              PVOID           pAddrBuf
    );

回答by Arpit Jain

Decalare this function Explicitly in your code.

在您的代码中明确声明此函数。

int inet_pton(int af, const char *src, void *dst)
{
  struct sockaddr_storage ss;
  int size = sizeof(ss);
  char src_copy[INET6_ADDRSTRLEN+1];

  ZeroMemory(&ss, sizeof(ss));
  /* stupid non-const API */
  strncpy (src_copy, src, INET6_ADDRSTRLEN+1);
  src_copy[INET6_ADDRSTRLEN] = 0;

  if (WSAStringToAddress(src_copy, af, NULL, (struct sockaddr *)&ss, &size) == 0) {
    switch(af) {
      case AF_INET:
    *(struct in_addr *)dst = ((struct sockaddr_in *)&ss)->sin_addr;
    return 1;
      case AF_INET6:
    *(struct in6_addr *)dst = ((struct sockaddr_in6 *)&ss)->sin6_addr;
    return 1;
    }
  }
  return 0;
}